Lock mechanism



H. G. KIEHL LOOK MECHANISM June 6, 1933.

Filed Dec. 10, 1931 FIG. 4.

m 5 mm W Ne N E R VK O m a? w A E m.

r a H M Y Patented June 6, 1933 HARRY e; RIEHL, or READING, PENNSYLVANIA; AssIGNoR TO READING; HARDWARE coRroRA'rIon, or READING, PENNSYLVANIA, AooRroRA'rIoN PATENT OFFICE LOCK MECHANISM A ueamn filed December10,"1931; Seria1 No.5 80,1 75.

Thisinvention relates to improvements in lockmechanisms. 1 p j j The primary objectof this invention is the provision of animproved' lock mechanism which will operateefliciently at all times independent of the actual position of the dead bolt. It frequently happens inlock mecha nisms that the dead bolt is only partially extended into its keeper by actuation of the turn knob on the inside of the closure. Un- T der such circumstances with some types of lock mechanisms, is impossible "to key actuate the deadbolt into fully retracted position. With the presentmechanism it-is possible for theoperator using a key in the outside of the lock, to fully retract the dead bolt,

1 without being aware that the same was not entirely thrown into fully extended position, merely with a natural bolt retracting turn of the key, y f j j j s .i f While I clearly understand that it is old to associate levers and the like directly upon the dead bolt, which willenable an opera-tor to fully retract the dead bolt from partially extended position by means of the key controlled cam,.such as shown in U. S. Patents Nos. 892,347 and 1,67 8,994, merely by a natural bolt retracting turnof the key controlled cam, and furtherithat by reverse rotation of the key controlled cam off the lock mechanism it is possible toretract thedead bolt fully from a partially extended positiomsuch as shown in U. S. Patent 1,099,105, yet the presentinvention' relates to means for more naturally accomplishing the desiredresult by the use of mechanism in which the parts are assembled in "a relatively simpleandsturdy association. j i

Other objects and advantages of this i11- vention will be'apparent during the course of the followingdetailed description.

i In the accompanying drawing, forming a part of this specification, and wherein similar reference characters designate corresponding parts I throughout the several views,

3 Figure. 1 a fragmentary view showing the details" of the improved lock mechanism,

with the dead bolt retracted. i I Figure 2is a View of the parts [shown Figure 1, with the dead bolt partially exg tended. j

' Figure 3 is a view showing the lock details with thedead bolt fullyextended.

Figure 4 is a fragmentary view showing theimproved association of a cam controlled lever, "with a camaction upon the dead bolt construction. i i j e Figures 5, 6 and 7 are fragmentarysectional views taken substantially on their respective lines in Figure lot the drawing. Inthe drawing, wherein for the purpose of illustration is shown only a preferred em-f bodiment of the invention, the letter A may. generally designate a lock mechanism, which may include a case B of any approved nature having the improved dead boltmechanism C associated therewith. A pin tumbler lock or other means D is mounted upon the case B for actuating the tumbler mechanism E and the retractionand projection of the dead bolt construction O, and for performing other functions commonly understood in this art. l r i The lock case B may include aiiace plate. 10 opposite side walls 15 and 16, and marginal boundary walls 17, which in the illustration are rigidly afilxed with the side wall 15 {the latter having tapped lugs 19 forreceiving screws 2O by means of which to attach the wall 16 in place. The design and structural features of the case B may vary widely.

The lock. bolt mechanism C is more particularly of thetype described in a co-pend ing 1 application, Serial No. 561,053, .filed September 3, 1931, in that the same includes a reciprocating frame 20 mounted in the lock case which rotatably supports the cylindrical deadlock bolts 21 and 22. The frame 20 is assisted in its guided movement by means of a lug 24; which 1 slides along a 1 horizontal groove 25 p ovided in the wall 15 of the lock case B, as shown in Figure j 1 Any approved type of camgoperating mechanism may be provided for actuating the tumbler E and bolt features of the lock, 9

In the preferred instance an adjustable pi-n tumbler type of lock cylinder 27 is used which is provided with a substantially Y shaped or bifurcated bolt actuatingcamarm Orton back 27. The latter provides the bit portions 28 and 29 which extend in relative divergence with respect to the axis of rotation of the cam arm.

The tumbler E is of the reciprocatory type including a body portion which is mounted directly upon the back of the deadbolt frame 20, as shown in'Fi'gure 4. Its upper "arm is provided with a pair of parallel extens ons or lugs 33 and 34 which slidably extend into the open spaces 35 and 36 respectively on the upper arm 38 of the dead bolt frame or shank 20. The lower arm of thetumbler body 30 is provided with an extension 39 which slides in an upwardly opening slot40 on the lower arm 41 of the dead bolt frame 20, as shown'in Figurel. This eXtens'iOnSQ terminates in a cylindrical shaped stud 42, against which the cam arms 44' of the thumb turn piece 45 operate, in order to actuate the tumbler E and thedead bolt mechanism C from the inside of the closure on which the lock mechanism ismounted, as will be well understood by those skilled in the art relating to this invention. 7 The tumblerE is provided with a rigid guide. rod or "finger 46 upon which a spiral spring 47 is mounted; the latter being compressed against an apertured lug 48 o'n'the rear of the dead bolt frame 20, in which the freeend of the finger 46 seats. This compression of the spring 47 normally urges the tumbler E in the direction of the 'cani'arm 27 A latch bolt isof course provided inconiiection 'with the lock mechanism A, but is not shown in the drawing Itis actuated,

as in I conventional practice, "by meansof a latch bolt operating lever 50 which is pivoted at 51 directly upon the dead bolt frarne*20. Alever 52 is also pivoted at 53 on the dead bolt frame20, as shown in Figure 1, in position to be actuated by the'cam arm 27 *after the deadbolt mechanism has beenfully retrabte'd, for the obvious purpose of retracting the latch bolt. V

, During normal operation, a key inserted into the pin tumbler cylinder '27? will permit actuation of' the cam arm 27, in well known manner, and to effect a projection of the dead bolts 21 and22 it is nierelynecessary to'turn't lie key in thenatural'direction,'whic feeds the bit ends28 and 29 of thepamarm 27 into the recesses35 and 36of thed'ead bolt frame 20. "Theyen'gagethe extensions 33 and 34 of the tumbler E, depressing thelatter so as to remove them from} engagement with the fixed'ffence orstump 55,"which is best shown in Figure 2 of the drawing. Engagement of the bit arms in the recesses 35 and 36 then permits movement of 'the frame 20 for projectingthe deadbolts 21 and 22 into their keepers, and as the cam arm 27 ismoved'to throw'the dead bolts to their 'fully projected positions the tumbler E 'springs'into position With the extensions 33 andr34in engagement at' opposite sidesofthe' fixed fence or stump 56, shown in Figure 2, which locks the'dead 'frame-20,-the latter and its dead bolts 21 and 22 therewith may be extended or retracted at will, from the inside of the closure on which the lock mechanism is placed.

If the dead bolt is not fully extended, as will sometimes happen, particularly when the same is actuated upon the inside of the closure o'nwhichthe lock mechanism is positioned, thru the thumb turn handle, it is readily'a'pparent that the bit ends of the cam arm 27 will not properly enter the recesses 35and 36' of the'frame '20 for actuating the tumbler mechanism. In order to compensate for such condition, so that involuntarily'th-e person actuating the dead bolt by means of a key will, by a natural retractive turnof the key, cause the proper synchronizing of the bit ends of the cam arm 27 with the frame and tumbler details, I have provided a spring actuated lever 7 O, which is pivoted at 71 direct-- ly upon the 'case B, This lever at its free end is provided with one arm portion 72, in position to engage a sloping surface 75 upon the rear surface 'of the frame 20. This surface 75, as shown in Figure 4 of the drawing, and elsewhere, is positioned at an acute angle with respectto theline of travel of the dead bolt mechanism. The spring 77 norma'lly'engages the lever 70 to force the arm 7 2 into a cam engagement'v'vith the surface 75,

as shown in the drawing. The. lever 70 also i has another-arm extension-7 9 which is normally out of the path of travel of the bit ends of the cam arm, 27 as the-dead bolts 21 and 22 are fully projected and fully retracted. However, ineve'nt the deadbolt is only partially projected, as shown in Figure 2 of the drawing, the-spring actuated lever-70 will be positioned so that the arm, portion 79 thereof lies in the path of travel of the free end ofthe cam arm 27. -Under these conditions, a person desiring to unlock the mechanism will insert a key, and turning the cylinder for a deadboltretracting operation will cause the bit end 29 of the cam arm 27 to'come into engagement with the arm portion 7 9 of the lever 7 O. The actuating force will push the lever 70, at the arm 72, against the cam surface 75 of the dead bolt frame 20 in order tocomplete thev projection of the dead bolts 21 and 22, and as the cam arm-27 is turned for a normal dead bolt retracting operation the same will actuate the tumbler Eand cause a complete retraction of-the dead bo'ltmechanism in a manner which is per-, fectly obvious from the above description in connection'with the illustration.

the bolt and in position to be engaged by the cam when the bolt is in partial locking extension and moved by further actuation of the cam into engagement with the bolt for moving the latter into fulllocking extension.

2. In a lock mechanism the combination of a case, a slidable bolt mechanism upon the case, tumbler mechanism operatively associated upon the case with the bolt mechanism, cam means for actuating the tumbler mechanism and bolt mechanism for retracting and projecting the latter with respect to the case, a spring actuated lever pivoted on a fixed axis on the case and spring urged into en gagement with the bolt mechanism, said lever being positioned out of the path of movement of the cam arm when the bolt mechanism is either fully projected or fully re-j tracted and in position to be engaged by the a cam arm when the bolt is only partially pro: jected so that during a normal bolt retracting movement the. cam arm will engage the lever and move it against the bolt mechanism and force the bolt mechanism into a fully projected position with respect to the case.

3. In a lock mechanism the combination of a case, a slidable dead bolt construction having a cam face thereon at an acute angle with respect to the line of travel of the bolt constructioma spring urged lever pivoted on the case having an end urged into engagement with the said cam face of the dead bolt mechanism, a cam arm for actuating the dead bolt construction, said lever having a portion thereof positioned in the path of travel of the cam arm only when the dead bolt is partially projected so that during a normal bolt retracting actuation of the cam arm the lever will be actuated thereby against said bolt construction for causing a projection thereof.

4. In a lock construction the combination of a case, a bolt construction slidable on the into cam engagement with the bolt construction, said member having a portion thereon positioned in the path of travel of the key actuated cam arm only when the bolt is partiallyprojected so that during a normal bolt retractingturn of the cam arm the latter will engage thelever and force it against saidboltconstruction for throwing the latter into fully projected position.

5.'Ina lock mechanism the combination of a cas'e, a dead boltbonstruction movably mounted-in the case, a movable tumbler mechanism; associated fwith the [case and dead bolt construction, a key actuated cam arm, said jbolt construction and tumbler mechanismhav'ing only rigid projections thereon for cooperation with the cam arm to cause fullprojection and full retraction of the bolt construction, and auxiliary meansengageably associated with the bolt construction and mounted in the case for movement relative to the bolt so as to be positioned in the pathof movement of the cam arm when the bolt construction is partially projected whereby during a normal bolt re tr actingturn of the cam arm thelatter will engage thesaid auxiliary means for forcing the "bolt construction into a fully projected position. i

1 6 "In lock mechanism, the combination of a case, a bolt movably mounted upon the case, aca-m for projecting and retracting the bolt, a member movably mounted upon the case independently with respect to the bolt and having interengagement with the bolt so as to be movable therewith into the advanced path of movement of said cam when the bolt is merely in partial locking extension" sothat during a normal bolt retracting movement the cam will first engage the member'and move it and the bolt therewith to project the bolt into lockingextension andtherea-fterthe camwill rideofi'the member and move the bolt into retracted position. a a

In a lock mechanism,the combination of a case, a bolt movably mounted uponthe case,a cam for projecting and retracting the boltya member movably mounted upon the case independently with respect to the bolt and having interengagement with the bolt so as to'be movable therewith into the advanced path of movement of said cam when the bolt is merely in partial locking extension so that during a normal bolt retracting movement the cam will first engage the member and move it and the bolt therewith to project the bolt into locking extension and thereafter the cam will ride off the member and move the bolt into retracted position, said memher being positioned out of the path of movement of the cam when the bolt is either fully projected or fully retracted.

8. In a lock mechanism, the combination of a case, a bolt movably mounted upon the case, a cam for projecting and retracting the bolt, and corrective means movably mounted in the case independently with respect to the bolt and cooperatively engageable by the cam when the bolt is in merely partial locking extension to project the bolt into full locking extension during the initial part of a bolt-retracting movement-of the cam.

9. In alock mechanism, the combination of a case, aibolt movably mounted upon the case, a'cam for projecting and retracting the bolt, and corrective means movably mounted in the case independently with respect to the bolt and cooperatively engageable by the cam 510 when the bolt is in merely partial locking extension to project the bolt into full locking extension during the initial part ofabolt retracting movement of thecam, said means being positioned out of the path of movement 115 of the camwhenthe bolt is either fully projected or fully retracted.

10. In a lock mechanism, the combination of a case, a bolt movably mountedqupon the case,a cam for projecting and retracting the F20 bolt, a'lever device pivoted upon the case and being associated with the bolt for movement therewith so as to be positioned in the path of the cant movement during a bolt retracting movement of the latter when the bolt is merely partially projected, whereby the cam will engage the lever device and move it and the bolt therewith to project the bolt into full locking extension.

11. In a lock, mechanism, the combination of a case, a bolt movably mounted upon the case, a cam for projecting and retracting .the bolt, a lever device pivoted upon the case and being associated with the bolt for movement therewith so asto be positioned in, the path 1535 of the cam movement during a boltretracting movement of the latter when the bolt is merelypartially projected, whereby the cam will engage thelever device and move it and the bolt therewith to correct the position of. the

bolt, said lever device being positionedoutof the path of movement of the cam when the bolt is fully projected and when itis'ful-ly retracted. Y V

HARRY G. -KIEHL. 

